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focal length of objective eye piece an inverting lens of terrestrial telescope are 20 cm , 10 cm , 5 cm respectively . length of the tube containing these lenses at normal adjustment is(1) 30 cm (2) 35 cm (3) 50 cm (4) 40 cm |
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Answer» focal length of objective eye piece an inverting lens of terrestrial telescope are 20 cm , 10 cm , 5 cm respectively . length of the tube containing these lenses at normal adjustment is (1) 30 cm (2) 35 cm (3) 50 cm (4) 40 cm |
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